Mixer shell for transit mixers



April 8, 1930. E. T. TULLER MIXER SHELL FOR TRANSIT MIXERS Filed Dec. 17, 1928 INVENTOR. 77%

A TTORNE Y.

Fatented Apr. 3, 1936 UNITED $TATES PATENT OFFIOE EDWARD 'I'. TULLEB, OF OAKLAND, CALIFORNIA, ASSIGNOB- TO TRANSIT MIXERS, DIG, OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF NEVADA man snnnr. FOR TRANSIT mrx'nns Application filed December 17, 1928. Serial No. 326,441.

In transit mixers of the type designed for carrying the dry aggregate and water to subsequently mix therewith, it is customary to transport the dry aggregate in the mixing cylinder and the water in separate tanks connected with the mixing cylinder through valve controlled pipes.

The object of the present invention is to combine the mixing cylinder and water tanks in a single unitary structure.

Another object is to arrange the mixing cylinder and water tanks so that a transverse division wall separates the water tanks from the mixing cylinder, and a simple valve struc- 18 ture controls the filling of the water tanks, the retention of the water therein, or the discharge of the water therefrom into the mixing cylinder.

Another object is to provide a mixing cyl- 20. inder and water tank structure which is capable of axial rotation with the minimum of power, and wherein the water tank structure is adapted for discharging water from ts varlous compartments into the mixing cylmder through a common inlet.

In the present illustration, the invention consists broadly in dividing the mixing cylmder near one end by a transverse wall to for1 n a water compartment and further in divldlng the water compartments by radial walls into sector shaped pockets, all commumcating through valve controlled ports wlth a water inlet aITd a water outlet leading into the mixing cylinder.

With the above mentioned and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described, illustrated in the accompanying drawings and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion,

size and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the'drawings disclosing the preferred embodiment ofmy invention,

Fig. 1 is a view in longitudinal section.

Fig. 2 is a view in transverse section on line 22 of Fig. 1.

Figs. 3, 4, 5 and 6 are transverse sectional views on corresponding lines through the valve structure, illustrated in Fig. 1.

Fig. 7 is a sectional View of the relief cock on line 7--7 of Fig. 1.

In the drawings, wherein like characters of reference designate corresponding parts- 1 indicates an elongated mixing cylinder or shell, preferably hollow, and provided on its surface with one or more U-tracks 2 in which operate bearing rollers 3 carried by supporting frame members 4. A toothed ring 5 is illustrated as carried on the exterior of the member 1, and intermeshing with the same is a pinion 6 affording a power means for axially rotating the cylinder through the ring The cylinder 1, near one end, is divided transversely by a partition wall 7, affording a compartment 8 for the dry aggregate and a container 9 for the water. The container 9 is divided into sector-shaped compartments by radial walls 10 connecting the cylinder end wall 11 and one surface of the wall 7. A tubular bore or recess 12 extends axially through the container 9 and from its wall surface the walls 10 radiate and are secured at their outer ends to the inner wall surface of the cylinder 1 within the container 9. The tubular bore 12 is provided within each sector shaped compartment and near its ends with orifices 13, and extending through the bore '5 a pipe 14, the surface of which at its point of passing through'the bore 12 snugly fits the inner wall surface of the bore. The pipe 14 extends axially into the mixing cylinder 1 and is provided with water discharge orifices 15, the outer end of the pipe connects through an elbow 16 with a section 17 which is adapted to connect with any suitable source of water supply. Packing glands 18 are associated with the walls 7 and 11 of'the container 9 surrounding the pipe 14' and afford non-leak joints between the ends of'the tubular bore 12 and the pipe 14.

The pipe 14 is formed in its surface between the walls 7 and ll'wit-h two circumferential row s'of orifices 19, which, on the rota tion ofthe cylinder 1, are adapted to register with the orifices of corresponding, circumferential rows formed in the tubular bore 12.

Longitudinally slidable within the pipe 14, at a point between the walls7 and 11, is a tubular open ended valve 20, the surface of which snugly fits the inner wall surface of the pipe 14. Midway of its length, the valve is provided with a transverse dividing wall 21, and from one end extends an operating rod or other means 22 extending through a gland 23 in the elbow 16 affording a hand manipulating portion 24. The surface of the valve 20 at each side of the transverse partition wall 21 is formed with a circumferential row of orifices 25 adapted on the longitudinal movement of the valve 20 within the pipe 14 to register one row at a time with the circumferential rows of orifices 13 and 19 formed respectively in the tubular bore '12 and the pipe 14, the operation of thevalve 20 controlling the admission of water into the container 9, its retention therein, and its discharge therefrom into the cylinder 1 through the orifices 15 in pipe 14. Each compartment of the container 9 is provided in its peripheral wall with an air vent opening 26 controlled by a ball valve 27, and is likewise provided with a valve casing 28 in which is rotatably mounted a valve 29 formed with a single port 30 extending there-- through. Extending from each valve 29 is a stem 31 mounting radial fingers 32 which, on the rotation of the cylinder 1, are adapted to move within the path of an operating finger 33 of a lever 34 fulcrumed to a supporting bracket, as at 35, the lever being operated through the longitudinal movement of the member 36.

In filling the respective compartments of the'container 9, it is desirable to have the cylinder 1 in rotation'and the valve 20 move longitudinally toward the end wall 11 until the orifices 25 at the outer end of the valve re 'ster with the orifices 13 and 19 of the tu ular bore 12 and pipe 14. When in this position, the solid portlon of the inner end of the valve 20 closes the other series of orifices 13 and 19. With the valve in its upward passage, as described, the water from the pipe 17 flows through an elbow 16 in the pipe 14 and into the compartments of :chamber 9 through the registering orifices 25, 19 and 13. To admit of the escape of the entrapped air in the respective compartments, it will be observed that the valve 29 associated with each compartment is, on the rotation of the cylinder lfi'otated a quarter turn by the actlonof one of the arms 33 to align the bore-30 therein and thepassag'efin its valve casing 28, thus the air under compression is relieved from each compartment when the compartment arrives at its point of atest elevation in its cycle of rotation. s the compartment in its cycle of rotation descends, another of the arms 33 imparts a quarter revolution to the valve 29 and closes the same so that the water will not escape through the valve casing 28 during such time as the respective compartments are passing through the lower half of their cycle of rotation. When the required quantity of water has. been delivered into the respective compartments of the container 9, the valve 20 is moved lon itudinally inward until the registration 0 its circumferential series of orifices 25 at opposite sides of the dividing wall 25 are out ,of register with the respective series of orifices 13 and 19. This operation of the valve positions a solid wall portion thereof in register with the series of orifices 13 and 19 and precludes the passage of water into or from the respective compartments of the container 9. When it is desired to permit the water in the compartments of chamber 9 to discharge therefrom into the pipe 14 and pass into the cylinder 1 to afford the moisture medium for wetting the aggregate, it is only necessary to move the valve 20 its full distance inwardly, at which time theseries of orifices 13 and 19 adjacent the end wall 11 will be blocked off from communication with the interior of the pipe 14 by the solid portion of the outer end of the valve 20. At this time, the series of orifices 13 and 19 adjacent the wall 7 will communicate with the interior of the pipe 4 through the orifices 25 in the wall surface of the valve 20 on the inner end of the transverse wall 21, to permit the rapid escape of the water from the respective compartments into the pipe 14 during the rotation of the cylinder 1. A vacuum is prevented from forming in each cylinder by the action ofball check valves 27 as they unseat openingpo'rts 26 as each compartment arrives at its po1nt of h1ghest elevation during its axial rotation.

The orifices 15 are formed in the end of the respective goose neck nozzles- 37 carried by and extending upwardly from the pipe 14, the orifices discharging downwardly preferably to one side of the longitudinal center of the pipe 14. The elevation of the water discharge above the pipe 14, and the formation of the nozzles in goose neck fashion with the discharge downwardly disposed precludes the discharge orifices from becoming'clogged. Clogging is further provided against by disposing the nozzles transversely of the pipe,

with their curves following the direction of rotation of the mixing cylinder.

I claim 1. A mixing cylinder comprising an elongated body mounted" for axial rotation, said body on its interior provided with a water container rotatable therewith, and valve controlled means for supplying water to the container and therefrom'into the mixing cylin- 2. A mixing cylinder comprising an. elongated body mounted for axial rotation, said body on its interior provided with a water container rotatable therewith, valve controlled means for supplying water to the con tainer and therefrom into the mixing cylinder, and controllable vent means in the water container wall.

. 3. A mixing cylinder comprising a cylindrical body mounted for axial rotation, said body divided transversely into a mixing compartment and water container, a spray pipe extending from the water container axially into the mixing compartment, and valve controlled means foradmitting water into the gatedv cylindrical body mounted foraxial r0 tation, a wall dividing said body transversely into a mixing compartment and water container, said water container divided radially into a plurality of water compartments, and valve means for controlling the flow of water from said water compartments into said mixing compartment. I

6. A mixing cylinder comprising an elongated cylindrical body mounted for axial ro-' tation, a wall dividing said body transversely into a mixing compartment and water container, radial Walls within said water container dividing the same into a plurality of water compartments, said com artments each provided with water inlet and ischarge openings, said openings grouped about the axis of rotation of the cylindrical body, a spray pipe extending axially of the mixing compartment and communicating with the compartment throughsaid opening, and valve means for controlling said water inlet and outlet openings.

7. A mixing cylinder comprising an elongated cylindrical body mounted for axial rotation, a stationary pipe extending axially into the cylindrical body from one end, a wall disposed transversely of the body near one end dividing the same into a mixing compartment and a water container, said water container provided with a tubular member extending axially therethrough and surrounding the portion of said pipe extending through said container, said tubular member and pipe provided with ports adapted to register on the rotation of said cylindrical body, and a valve for controlling said ports.

8. A mixing cylinder mounted for axial rotation and provided with a water container rotatable and connnunicable therewith, and vent means for said container adapted to be successively o ened and closed at predetermined points uring its cycle of rotation.

9. An elongated mixing cylinder mounted for axial rotation and provided interiorly with a water container rotatable and communicable therewith and "vent means for said container adapted to be actuated approximately at its point of greatest elevation in its cycle of rotation.

TO. A mixing cylinder mounted for axial rotation and provided with a water container rotatable and communicable therewith, vent" means for said container, means for actuating said vent means, and means for selectively rendering said actuating means operative or inoperative.

11. A mixing cylinder mounted for axial rotation and provided at one end with a series of water containers rotatable and communicable therewith, vent" valves for said containers, and means for automatically opening and closing said vent valves approximately at their point of greatest elevation in of rotation.

In testimony whereof I have name tothis specification.

. EDWARD T. TULLER.

their cycle signed my ion 

